Delta AS Series Programming Manual page 1163

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AS Ser ies Pro gra mm in g M anu al

This instruction specifies the pulse output (S

frequency change. S

output frequency between 0 Hz–200 kHz for the open collector output models. The unit of the output frequency is 1

Hz. The tolerable error rate for 200 kHz is about 0.02% and for 100 kHz it is about 0.01%. The error rate decreases

with decreasing frequency. For example, if the output frequency setting is 199990 Hz, the actual output is 199960

Hz. If the output frequency setting is 99999 Hz, the actual output is 99990 Hz. If the output frequency is out of the

valid range, the PLC automatically processes it as the maximum or minimum pulse output frequency.

After the instruction is executed, you can change the target output frequency specified by S

the ramp up or ramp down process according to the ramp up or ramp down time setting S

frequency is when the PLC is scanning the instruction and the instruction has completed output of a full pulse.

is the number of output pulses. The range is between 0–2,147,483,647. When you set the number of pulses to 0,

then the number of pulses is not restricted and pulses are output continuously until the instruction is disabled.

specifies the pulse output frequency as 4 MHz for line driver output models and the pulse

Pulse Instruction

Target output frequency

Number of output pulses

Ramp-up/ down time

Pulse output device

) for the device specified in D with ramp up or ramp down in the

High-speed pulse output

(with ramp-up/down process)

16-bit instruction

32-bit instruction

and the PLC performs

. The time to change the

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